For sale is a MILITARY ARMY UNIVERSAL DC POWER SUPPLY BATTERY CHARGER PP-1659A/G.
110v input, makes up to 150 volts DC, I believe unfiltered. It has a
variable transformer to select fine and coarse voltage. It does
work and I used it for a few years. I no longer need it. The coarse
voltage switch, while generally works, is slightly iffy in a couple
of positions, you need to nudge it slightly to get output
voltage.